Make icons of scripted and custom classes fit the editor UI

Also:
- Add an option to limit the icon size in PopupMenu.
This is similar to how this works in Tree and TreeItem.
- Add the same option to TabBar.
- Add a theme constant for Tree, PopupMenu, Button, and
TabBar to apply this limit on the control level.

Co-authored-by: Daylily-Zeleen <daylily-zeleen@foxmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/scene/gui/tab_bar.h b/scene/gui/tab_bar.h
index dc70a84689..a232061b69 100644
--- a/scene/gui/tab_bar.h
+++ b/scene/gui/tab_bar.h
@@ -62,6 +62,8 @@ private:
 
 		Ref<TextLine> text_buf;
 		Ref<Texture2D> icon;
+		int icon_max_width = 0;
+
 		bool disabled = false;
 		bool hidden = false;
 		int ofs_cache = 0;
@@ -106,6 +108,7 @@ private:
 
 	struct ThemeCache {
 		int h_separation = 0;
+		int icon_max_width = 0;
 
 		Ref<StyleBox> tab_unselected_style;
 		Ref<StyleBox> tab_selected_style;
@@ -133,6 +136,7 @@ private:
 	} theme_cache;
 
 	int get_tab_width(int p_idx) const;
+	Size2 _get_tab_icon_size(int p_idx) const;
 	void _ensure_no_over_offset();
 
 	void _update_hover();
@@ -171,6 +175,9 @@ public:
 	void set_tab_icon(int p_tab, const Ref<Texture2D> &p_icon);
 	Ref<Texture2D> get_tab_icon(int p_tab) const;
 
+	void set_tab_icon_max_width(int p_tab, int p_width);
+	int get_tab_icon_max_width(int p_tab) const;
+
 	void set_tab_disabled(int p_tab, bool p_disabled);
 	bool is_tab_disabled(int p_tab) const;